﻿<p>The function returns a two-dimensional direction, using the x/y ratios of a two or three-dimensional direction as input.</p>
<blockquote class="note">NOTE&nbsp; This functions is currently solely used to determine the <em>TrueNorth</em> direction in <em>IfcGeometricRepresentationSubContext</em>.
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<blockquote class="history">
HISTORY&nbsp; New function in IFC2x4.
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